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Commitments and Contingencies - Legal Matters - Additional Information (Detail) | 6 Months Ended | 198 Months Ended |
--- | --- | --- | ---
Jun. 30, 2018 USD ($) Case | Jun. 30, 2018 USD ($) Case | Dec. 31, 2017 Case
Commitments And Contingencies Disclosure [Abstract] |  |  |
Cumulative settlement payments for cases involving asbestos-related claims | $ |  | $ 2,900,000 |
Cumulative settlement payments made for cases involving asbestos-related claims with all legal fees other than corporate counsel expenses | $ |  | 2,800,000 |
Average cost per settled claim excluding legal fees | $ | $ 37,000 | $ 37,000 |
Number of claims pending | 203 | 203 | 218
Number of new cases filed | 53 |  |
Number of cases dismissed | 29 |  |
Number of cases settled | 39 |  |
Assessment regarding Loss contingency impact Description | We are not aware of pending claims or assessments, other than as described above, which may have a material adverse impact on our liquidity, financial position, results of operations, or cash flows. |  |

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- Definition The weighted average cost per settled claim based on the number of claims settled and the amount paid in aggregate for asbestos related claims. + References No definition available. + Details
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- Definition Litigation and settlement awarded from insurers. + References No definition available. + Details
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- Definition Describes management's process to evaluate the contingency matter and to estimate the impact on the financial statements and ongoing operations, such as added credit risk or loss of customers, including pertinent information to adequately disclose the matter and significant assumptions underlying the estimates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14557-108349 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14435-108349 + Details
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- Definition Number of pending claims pertaining to a loss contingency. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14435-108349 + Details
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